2006-2013 LS7 and LS9 Corvette Spark Plugs are not changed as frequently as in years past. Because of the modern materials, they last a lot longer and provide more performance. When it is time to change, stay with what is correct for your car.
ACDelco Iridium Spark Plugs are the latest evolution in high-performance plug electrode material and are designed to last 100,000 miles.